Chemical roofing material.



NITED STATES PATENT OFFICE.

JAMES M. WRIGHT, OF BLOOMINGTON, INDIANA, ASSIGNOR TO HORACE BLAKELY, OF INDIANAPOLIS, INDIANA, AND JEFFERSON M. WRIGHT, OF BLOOMINGTON, INDIANA.

CHEMICAL ROOFING MATERIAL.

SPECIFICATION forming part of Letters Patent N 0. 691,882, dated January 28, 1902.

Application filed October 18, 1901. Serial No. 79,165. (No specimens.) I

To aZZ whom it may concern: from six to eight ounces of finely-powdered Be itknown that I, JAMES M.WRIGHT, acitigypsum. Through this composition, kept at zen of the United States, residing at Blooma high boiling temperature, pass a material, ington, in the county of Monroe and State of such as paper or cloth, in such a manner as 5 Indiana, haveinvented acertain new and use to submerge both sides of such material in t'ul Chemical Roofing Material, of which the said mixture, thereby saturating and coating 40 following is a specification. the said material, rendering it waterproof and My composition consists of the following inpractically fireproof. The paper or cloth will gredients,combinediu the proportions stated, dry out rapidly after passing through the IO viz; coal tar, one gallon; slaked lime, two composition, and when dry it is ready for use.

ounces; sal-soda, (sodium carbonate,) one- Having thus fully described my invention, half ounce; gum-acacia, one-fourth ounce; what I claim as new, and Wish to secure by oxid of zinc, one-fourth ounce; litharge, five Letters Patent, isounces; gypsum, (sulfateof lime,)sixtoeight 1. The herein-described composition of I 5 ounces. Any multiple of these ingredients matter, consisting of coal-tar, lime, sal-soda,

in the above proportion may be taken, degum-acacia, oxid of zinc, litharge, and gyp- 5o pending on the quantity required. sum, substantially as described and for the The composition will be prepared and appurposes specified. plied in the following manner, viz: Heat one 2. The herein described composition of 20 gallon of coal-tar (or multiple thereof and of matter for preparing building material, conthe followingingredients) until almost at the sisting of coal-tar one gallon, slaked lime boilingpoint, stirring it slowly and contwo ounces, sal-soda one-half ounce, gumstantly. Then add about twoounces ofslaked acacia one-fourth ounce, oxid of zinc onelime and stir until well mixed. Then succesfourth ounce, litharge five ounces and gyp- 25 sively add about one-half ounce of sal-soda sum six to eight ounces, substantially as deand one-fourth ounce of gum-acacia, stirring scribed. each in well before adding the other. After In Witness whereof I have hereunto set my adding the gum-acacia and stirring in well hand and seal, at Indianapolis, Indiana, this let the mixture boil gently for twenty min- 12th day of October, A. D. 1901.

30 utes. Then add one-fourth ounce of oxid of I zinc and after that five ounces of litharge, JAMES WRIGHT" i stirring each in Well before adding another. Witnesses: Then increase the heat and boil hard for JOSEPH A. MINTURN,

twenty minutes, at the end of which time add S. MAHLON UNGER. 

